WO2012157526A1

WO2012157526A1 - Attachment device for separation film element in separation film module

Info

Publication number: WO2012157526A1
Application number: PCT/JP2012/062032
Authority: WO
Inventors: 藤田　優; 高木　義信; 祥広浅利
Original assignee: 日立造船株式会社
Priority date: 2011-05-17
Filing date: 2012-05-10
Publication date: 2012-11-22
Also published as: EP2711070A1; EP2711070A4; JP2012239949A; CN103619447A; US20140201985A1

Abstract

The present invention provides an attachment device for a separation film element in a separation film module, which facilitates a maintenance operation, has excellent durability under various usage conditions, and is cost effective. A sealing member of an attachment device for a separation film element (3) of a separation film module (1) comprises a plurality of segmented round packing elements (7) having, for example, a segmented rounded shape as viewed from a graphite plane surface. The plurality of segmented round packing elements (7) is stacked stepwise to fit onto and cover a top end (3a) of the separation film element (3), and cutout sections (8, 8) of vertically-adjacent segmented round packing elements (7a, 7b) are, when viewed from the plane surface, positioned at mutually different locations. The stepwise-stacked segmented round packing elements (7) are received by an inward-projecting annular receiving part (12) in a tube sheet attachment hole (11), and the stepwise-stacked segmented round packing elements (7) are then tightly pressed into the annular receiving part (12) by screwing in a pressing bracket (20), thus forming a tight seal.

Description

Separation membrane element mounting device in separation membrane module

The present invention relates to a separation membrane element mounting apparatus in a separation membrane module used for separation of fluid such as a mixed gas or a solution, and more particularly to a mounting seal structure for a separation membrane element. More specifically, the separation membrane element mounting apparatus according to the present invention is applied to a separation membrane module that separates a fluid using a zeolite separation membrane, such as various gas separations and solvent-based dehydration.

Conventionally, a separation membrane module has been known as an apparatus for separating components in a mixed gas or a solution. As a tubular separation membrane element mounted on the separation membrane module, a material such as alumina or zirconia is generally used. Tubular separation membrane element body in which the formed tubular ceramic porous substrate is coated with a zeolite thin film having fine pores of molecular size, and a connecting pipe made of dense ceramics at one end of the separation membrane element body And an integral tubular inorganic separation membrane element in which a dense ceramic sealing plug is joined to the other end of the separation membrane element main body.

As a prior art regarding the mounting structure when incorporating such a tubular separation membrane element into a separation membrane module, as described in Patent Document 1 below, a material such as a fluororubber system is used at the upper end of the tubular separation membrane element. A structure that fills the seal space by crushing the O-ring from the top by fitting the O-ring and screwing the presser fitting, and the pressure difference that occurs during practical operation called Teflon (registered trademark) material so-called omni seal The thing of the structure sealed using is known.

In addition, as described in Patent Document 2 below, a structure is also known in which a metal ring is fitted on the upper end portion of the tubular separation membrane element, and the metal ring is held and sealed via a gland packing and a heat-expandable mat. ing.

Furthermore, as described in Patent Document 3 below, a metal seal ring having a trapezoidal cross section is fitted on the upper end portion of the tubular separation membrane element, and the ring having the trapezoidal cross section is tapered by screwing a holding metal fitting. There is also known a structure for sealing by pressing against the receiving portion and bringing it into close contact with the surface to be sealed.

JP 2009-226374 A Japanese Utility Model Publication No. 6-25760 JP 2011-72972 A

However, according to the conventional method using the O-ring described in Patent Document 1, since the O-ring is made of a soft material such as fluororubber, the pressing deformation at the time of sealing is easy. The space to be sealed is easy to fill, and a reliable sealing property can be secured. However, there is a problem that the medium to be used is limited in a high temperature / high pressure environment and the use is limited to a neutral solvent system.

Further, according to the conventional method using the so-called omni-seal structure sealing member described in Patent Document 1, since the sealing member is made of a Teflon (registered trademark) material, there is also a problem that the operating temperature and pressure are limited. In addition, there is a problem in that it takes a relatively long time to install the tubular separation membrane element because a structure with a small gap in size is unavoidable.

According to the conventional method using the metal ring gripping gland packing described in Patent Document 2, a heat-expandable mat is used in addition to the gland packing, and the tubular separation membrane element is attached to the metal ring. Due to the mounting structure, there are a large number of additional parts, which inevitably increases the mounting pitch of the tubular separation membrane elements, and there is a high possibility that the volumetric efficiency of the separation membrane module is reduced.

According to the conventional method using the trapezoidal metal seal ring described in Patent Document 3, it can be applied to copper or aluminum having a small Young's modulus (that is, easily deformable) from the structural aspect. And aluminum have a problem that the medium (fluid) that can be handled is limited.

For example, when the Young's modulus of the stainless steel level, which is the same material as the separation membrane module, is used, this is used as a sealing member, and the sealing structure of the separation membrane element in the separation membrane module used for separation of fluid such as mixed gas or solution is obtained. The problem was that it was actually a difficult situation.

The object of the present invention is to solve the above-mentioned problems of the prior art, and workability of attaching a separation membrane element to the tube plate of the separation membrane module via a seal member, or maintenance work such as replacement of the separation membrane element. It is an object of the present invention to provide a device for attaching a separation membrane element in a separation membrane module, which is easy and has excellent resistance under various use conditions and is advantageous in terms of cost.

To achieve the above object, the invention of the separation membrane element mounting device in the separation membrane module according to claim 1 comprises a casing (2) having a tube plate (10) and a tube plate (10) suspended. And a plurality of tubular separation membrane elements (3) attached in parallel, and a press fitting (20) for fixing each tubular separation membrane element (3) to the tube plate (10) via a seal member, A mounting hole (11) is formed in a penetrating manner in the attachment position of the separation membrane element (3) of the tube plate (10), and an inward projecting annular receiving portion (12) is provided at the lower part of the inner peripheral surface of the mounting hole (11). In addition, a female thread portion (14) is provided at the upper part of the inner peripheral surface of the mounting hole (11), and the pressing metal fitting (20) is a top wall (21) having a gas passage hole (23) and a cylinder connected to the outer peripheral portion thereof. It consists of a hanging wall (22) and a cylindrical hanging wall ( 2) In the separation membrane module (1) in which the outer threaded surface (24) is provided on the outer peripheral surface of 2), the sealing member is constituted by a plurality of rounded packings (7) having a rounded shape when viewed from the plane, The upper end (3a) of the separation membrane element (3) is inserted into the mounting hole (11) of (10), and the outer peripheral surface of the upper end (3a) of the separation membrane element (3) in the mounting hole (11) A plurality of cutout circular packings (7) are stacked and fitted to each other, and the cutout portions (8) and (8) of the upper and lower cutout circular packings (7a) and (7b) are mutually viewed from the plane. These circular packings (7) are arranged at different positions and are received by the inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface of the tube plate mounting hole (11), so that the tube plate (10) is mounted. Tube of presser fitting (20) in hole (11) The hanging wall (22) is fitted, the male threaded portion (24) of the presser fitting (20) is screwed to the female threaded portion (14) of the mounting hole (11), and the cylindrical hanging wall ( 22), the plurality of rounded circular packings (7) are pressed against the annular receiving portion (12) at the lower peripheral surface of the mounting hole (11), and the mounting holes (7) 11) and the outer peripheral surface of the upper end (3a) of the separation membrane element (3) are hermetically sealed.

In the separation membrane element mounting apparatus in the separation membrane module according to claim 1, it is preferable that the missing circular packing (7) is made of graphite.

The invention of the attachment device of the separation membrane element in the separation membrane module according to claim 3 includes a casing (2) having the tube plate (10) and a plurality of attachments in a suspended and parallel manner to the tube plate (10). The tubular separation membrane element (3) and a pressing metal fitting (20) for fixing each tubular separation membrane element (3) to the tube plate (10) via a seal member are provided, and the tube plate (10) is separated. A mounting hole (11) is formed in a penetrating manner at a mounting position of the membrane element (3), an inward projecting annular receiving portion (12) is provided at a lower portion of the inner peripheral surface of the mounting hole (11), and the mounting hole (11) A female screw part (14) is provided at the upper part of the inner peripheral surface, and the presser fitting (20) is composed of a top wall having a gas passage hole and a cylindrical drooping wall (22) connected to the outer circumference thereof, and has a cylindrical droop. Male thread (24) is provided on the outer peripheral surface of the wall (22) In the separation membrane module (1), the sealing member is constituted by a ring-shaped packing (9) made of a thin metal plate having a concave cross section that opens upward, and the mounting hole (11) of the tube plate (10) A tapered surface (13) that gradually tapers downward is provided on the annular receiving portion (12) at the lower part of the inner peripheral surface, and a thin tip (25) is formed at the lower end of the cylindrical hanging wall (22) of the presser fitting (20). ), And the thin tip portion (25) has an inner peripheral surface of the receiving portion (12) below the tapered surface (13) of the annular receiving portion (12) and the upper end of the tubular separation membrane element (3). The upper end (3a) of the separation membrane element (3) is inserted into the mounting hole (11) of the tube sheet (10). In addition, the separation membrane element (3 A ring-shaped packing (9) made of a thin metal plate having a concave cross section is fitted on the outer peripheral surface of the upper end (3a) of the metal plate with its opening (9a) facing upward, and this ring-shaped ring made of a thin metal plate having a concave cross section. The packing (9) is received by the inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface of the tube plate mounting hole (11), and the cylinder of the presser fitting (20) is mounted on the mounting hole (11) of the tube plate (10). The shaped hanging wall (22) is fitted, the male threaded portion (24) of the presser fitting (20) is screwed to the female threaded portion (14) of the mounting hole (11), and the cylindrical hanging wall of the presser fitting (20) The thin tip (25) of (22) enters the upward opening (9a) of the ring-shaped packing (9) having a concave cross section from above, and the thin tip (25) has a concave metal in cross section. By pressing the thin ring packing (9) from above, metal The thin ring packing (9) made of thin plate is deformed along the outer surface of the thin tip (25) of the holding metal fitting (20), and the ring packing (9) and holding metal fitting (20) made of this deformed metal thin plate are used. The tapered surface (13) of the annular receiving portion (12) and the inner peripheral surface of the receiving portion (12) below the annular receiving portion (12) and the upper end portion (3a) of the tubular separation membrane element (3) ) It is characterized by sealing between the outer peripheral surface.

In the attachment device for a separation membrane element in the separation membrane module according to claim 3, it is preferable that the ring-shaped packing (9) made of a thin metal plate having a concave cross section opened upward is made of stainless steel.

The invention of the separation membrane element mounting device in the separation membrane module according to claim 1 comprises a casing (2) having a tube sheet (10) and a plurality of tubes attached to the tube sheet (10) in a suspended and parallel manner. A separation membrane element (3) and a pressing metal fitting (20) for fixing each tubular separation membrane element (3) to the tube plate (10) via a seal member, the separation membrane element of the tube plate (10) A mounting hole (11) is formed in the mounting portion in a penetrating manner, and an inward projecting annular receiving portion (12) is provided at a lower portion of the inner peripheral surface of the mounting hole (11), and an upper portion of the inner peripheral surface of the mounting hole (11). The holding screw (20) is formed of a top wall (21) having a gas passage hole (23) and a cylindrical hanging wall (22) connected to the outer peripheral portion thereof, and has a cylindrical shape. The external thread (24) is on the outer peripheral surface of the hanging wall (22). In the separation membrane module (1), the sealing member is constituted by a plurality of partial circular packings (7) having a circular shape when viewed from the plane, and is separated into the mounting holes (11) of the tube plate (10). The upper end (3a) of the membrane element (3) is inserted, and a plurality of notch packings (7) are provided on the outer peripheral surface of the upper end (3a) of the separation membrane element (3) in the mounting hole (11). The missing portions (8) and (8) of the stacked circular seals (7a) and (7b) that are stacked and fitted and are adjacent to each other are arranged at positions different from each other as viewed from the plane. The packing (7) is received by the inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface of the tube plate mounting hole (11), and the cylinder of the presser fitting (20) is mounted on the mounting hole (11) of the tube plate (10). The hanging wall (22) is inserted, The male threaded portion (24) of the presser fitting (20) is screwed to the female threaded portion (14) of the perforated hole (11), and a plurality of stepped circular shapes are formed by the tip of the cylindrical hanging wall (22) of the presser fitting (20). The packing (7) is pressed against the annular receiving portion (12) at the lower peripheral surface of the mounting hole (11), and the inner peripheral surface of the mounting hole (11) and the separation membrane element ( 3) The upper end (3a) outer peripheral surface of 3) is sealed, and according to the invention of claim 1, the separation membrane element is placed on the tube plate of the separation membrane module via the seal member. The workability of the attaching work or the maintenance work such as the replacement of the separation membrane element is easy, and the durability under various use conditions is excellent, and the cost is advantageous.

The invention of the attachment device of the separation membrane element in the separation membrane module according to claim 3 includes a casing (2) having the tube plate (10) and a plurality of attachments in a suspended and parallel manner to the tube plate (10). The tubular separation membrane element (3) and a pressing metal fitting (20) for fixing each tubular separation membrane element (3) to the tube plate (10) via a seal member are provided, and the tube plate (10) is separated. A mounting hole (11) is formed in a penetrating manner at a mounting position of the membrane element (3), an inward projecting annular receiving portion (12) is provided at a lower portion of the inner peripheral surface of the mounting hole (11), and the mounting hole (11) A female screw part (14) is provided at the upper part of the inner peripheral surface, and the presser fitting (20) is composed of a top wall having a gas passage hole and a cylindrical drooping wall (22) connected to the outer circumference thereof, and has a cylindrical droop. Male thread (24) is provided on the outer peripheral surface of the wall (22) In the separation membrane module (1), the sealing member is constituted by a ring-shaped packing (9) made of a thin metal plate having a concave cross section that opens upward, and the mounting hole (11) of the tube plate (10) A tapered surface (13) that gradually tapers downward is provided on the annular receiving portion (12) at the lower part of the inner peripheral surface, and a thin tip (25) is formed at the lower end of the cylindrical hanging wall (22) of the presser fitting (20). ), And the thin tip portion (25) has an inner peripheral surface of the receiving portion (12) below the tapered surface (13) of the annular receiving portion (12) and the upper end of the tubular separation membrane element (3). The upper end (3a) of the separation membrane element (3) is inserted into the mounting hole (11) of the tube sheet (10). And the separation membrane element (3) in the mounting hole (11) A ring-shaped packing (9) made of a thin metal plate having a concave cross section is fitted on the outer peripheral surface of the upper end (3a) of the metal plate with its opening (9a) facing upward, and this ring-shaped ring made of a thin metal plate having a concave cross section. The packing (9) is received by the inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface of the tube plate mounting hole (11), and the cylinder of the presser fitting (20) is mounted on the mounting hole (11) of the tube plate (10). The shaped hanging wall (22) is fitted, the male threaded portion (24) of the presser fitting (20) is screwed to the female threaded portion (14) of the mounting hole (11), and the cylindrical hanging wall of the presser fitting (20) The thin tip (25) of (22) enters the upward opening (9a) of the ring-shaped packing (9) having a concave cross section from above, and the thin tip (25) has a concave metal in cross section. By pressing the thin ring packing (9) from above, metal The plate-shaped ring packing (9) is deformed along the outer surface of the thin tip (25) of the presser fitting (20), and the deformed metal plate ring-like packing (9) and the presser fitting (20). The tapered surface (13) of the annular receiving portion (12) and the inner peripheral surface of the receiving portion (12) below the annular receiving portion (12) and the upper end portion (3a) of the tubular separation membrane element (3) ) The outer peripheral surface is hermetically sealed. According to the invention of claim 3, the operation of attaching the separation membrane element to the tube plate of the separation membrane module via the seal member, or alternatively The workability of the maintenance work such as replacement of the separation membrane element is easy, and the resistance under various use conditions is excellent, and the cost is advantageous.

において In the separation membrane element mounting apparatus in the separation membrane module according to claim 3, it is preferable that the ring-shaped packing (9) made of a thin metal plate having a concave cross section opened upward is made of stainless steel.

It is a longitudinal cross-sectional view which shows an example of a separation membrane element. It is a longitudinal cross-sectional view which shows an example of a separation membrane module. It is an expanded sectional view which shows 1st Embodiment of the attachment apparatus of the separation membrane element of this invention. FIG. 4 is an enlarged perspective view of a partially circular packing used in the separation membrane element attachment device of FIG. 3. It is an expanded sectional view which shows 2nd Embodiment of the attachment apparatus of the separation membrane element of this invention, The state which attached the ring-shaped packing made from a thin metal plate to the upper end part of the tubular separation membrane element is shown. FIG. 6 is an enlarged perspective view of a part of the ring-shaped packing made of a thin metal plate used in the separation membrane element attachment device of FIG. 5. FIG. 6 is an enlarged cross-sectional view of the separation membrane element mounting device of the present invention shown in FIG. 5, showing a sealed state in which the ring-shaped packing made of a thin metal plate is deformed by screwing a holding fitting fitted on the upper end portion of the tubular separation membrane element.

1: Separation membrane module 3: Tubular separation membrane element 3a: Upper end portion 4: Separation membrane element main body 7: Partially circular packing 7a: Partially circular packing 7b: Partially circular packing 8: Defect portion 9: Ring-shaped packing made of metal sheet 9a: Upward opening 10: Tube plate 11: Mounting hole 12: Inward projecting annular receiving part 13: Tapered surface 14: Female thread part 20: Press fitting 22: Cylindrical hanging wall 24: Male thread part 25: Thin-walled tip part

Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

The separation membrane element mounting apparatus according to the present invention is applied to a separation membrane module that separates fluids using a zeolite separation membrane, such as various gas separations and solvent-based dehydration.

FIG. 1 is a longitudinal sectional view showing an example of a tubular separation membrane element (3). FIG. 2 is a longitudinal sectional view showing an example of the separation membrane module (1) including the tubular separation membrane element (3) of FIG.

First, in FIG. 1, in the tubular separation membrane element (3), a tubular ceramic porous substrate formed of a material such as alumina or zirconia is coated with a zeolite thin film having fine pores of molecular size. The tubular separation membrane element body (4) and one end of the separation membrane element body (4) are joined to a dense ceramic connecting pipe (5), and the other end of the separation membrane element body (4) is dense. A ceramic sealing plug (6) is joined, and an integral tubular inorganic separation membrane element (3) is used.

Next, in FIG. 2, the separation membrane module (1) is provided with a horizontal tube plate (10) near the top wall in the casing (2), and this tube plate (10) has the tubular shape shown in FIG. The required number of separation membrane elements (3) are attached in a suspended and parallel manner. A required number of baffle plates (30) are provided in parallel with the tube plate (10) below the tube plate (10) in the casing (2). The number of baffle plates (30) attached is usually 2 to 30, although it depends on the size of the casing (2). Each baffle plate (30) is provided with a plurality of openings, and the tubular separation membrane element (3) passes through these openings. The baffle plate (30) is airtightly engaged with the inner surface of the casing (2).

And the to-be-processed fluid inlet (31) is provided in the trunk | drum wall upper part of the casing (2), the to-be-processed fluid outlet (32) is provided in the bottom wall of the casing (2), and the top wall center part of the casing (2) Is provided with a permeate gas outlet (33). In addition, the inlet / outlet of the to-be-processed fluid inlet (31) and the to-be-processed fluid outlet (32) is not restricted to the case of the said embodiment, It is good also as a reverse arrangement | positioning.

For example, when the mixed fluid of hydrogen (H ₂ ) and carbon dioxide (CO ₂ ) is separated using the multi-tubular separation membrane module (1), the inside of the casing (2) from the treated fluid inlet (31) A mixed fluid of hydrogen (H ₂ ) and carbon dioxide (CO ₂ ) is supplied. The mixed fluid passes through the casing (2) in a zigzag manner as viewed from the front through the gap between the baffle plates (30) and the gap between the tubular zeolite membrane elements (3). Carbon dioxide (CO ₂ ) passing through each tubular membrane element (3) is discharged from the permeated gas discharge port (33), and hydrogen (H ₂ ), which is a non-permeating fluid, flows into the baffle plate (30) and the tubular membrane. It passes through the gap between the elements (3) and the gap between the tubular membrane elements (3), and finally flows out from the discharge port (32).

The structure of the separation membrane module (1) is not limited to the case of the above embodiment, and may be a double tube structure in which the tubular separation membrane element (3) and its outer tube (not shown) are paired. .

FIG. 3 is an enlarged cross-sectional view showing a first embodiment of the separation membrane element mounting apparatus of the present invention, and FIG. 4 is an enlarged view of a notch circular packing (7) used in the separation membrane element mounting apparatus of FIG. It is a perspective view.

In the figure, a separation membrane module (1) includes a casing (2) having a tube plate (10) and a plurality of tubular separation membrane elements (3) attached to the tube plate (10) in a suspended and parallel manner. And a press fitting (20) for fixing each tubular separation membrane element (3) to the tube plate (10) via a seal member.

And the attachment hole (11) is opened in the attachment location of the separation membrane element (3) of the tube plate (10), and an inward projecting annular receiving portion (12) is formed at the lower part of the inner peripheral surface of the attachment hole (11). While being provided, an internal thread part (14) is provided in the upper part of the inner peripheral surface of the attachment hole (11).

The presser fitting (20) includes a top wall (21) having a gas passage hole (23) and a cylindrical hanging wall (22) connected to the outer periphery of the top wall (21), and has an external thread on the outer peripheral surface of the cylindrical hanging wall (22). A part (24) is provided.

The upper end (3a) of the separation membrane element (3) is inserted into the attachment hole (11) of the tube plate (10) of the separation membrane module (1), and the separation membrane element (3) is inserted into the attachment hole (11). ) And a plurality of cutout circular packings (7) are overlapped and fitted on the outer peripheral surface of the upper end portion (3a), and the cutout portions (8) (8) of the cutout circular packings (7a) and (7b) adjacent to each other in the vertical direction. ) Are arranged at positions different from each other as seen from the plane, and these round circular packings (7) are formed in the inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface of the tube plate mounting hole (11). In this embodiment, the cylindrical hanging wall (22) of the presser fitting (20) is fitted into the mounting hole (11) of the tube plate (10), which is received through the metal receiving ring (15).

In addition, by using the metal receiving ring (15) in this embodiment as a receiver for the missing circular packing (7), the separation membrane element (3) is inserted into the mounting hole (11), and then the missing circular packing (7). Can be set together with the metal receiving ring (15). As a result, it is possible to create a state in which the separation membrane element (3) can be easily inserted when the separation membrane element (3) is attached.

Then, the male screw portion (24) of the press fitting (20) is screwed to the female screw portion (14) of the mounting hole (11) of the tube plate (10), and the cylindrical hanging wall (22) of the press fitting (20) is fitted. A plurality of stepped circular packings (7) are pressed against the annular receiving part (12) at the lower peripheral surface of the mounting hole (11) by the tip, and the mounting hole (11) is inserted through these circular packings (7). The inner peripheral surface and the upper end portion (3a) outer peripheral surface of the separation membrane element (3) are sealed.

Here, it is preferable that the oval packing (7) having an oval shape as seen from the plane is made of graphite from the viewpoint of the material. In other words, graphite is widely resistant to various media such as acids and alkalis under high temperature and high pressure environments, and is in a state of being widely available as a ring molded product.

Further, this graphite round circular packing (7), which is a molded product, is manufactured by a method of molding rod-shaped graphite into a ring shape, and is not a complete ring shape, but a defective portion (crack) (8). ) Exists.

Therefore, rotation of this graphite round circular packing (7) is taken into consideration so that the chipped portion (crack) (8) does not overlap when two or more layers, preferably three or more layers are stacked. For example, if the missing circular packing (7) is stacked in two stages, the arrangement of the missing part (8) is distributed to 180 °, and if the missing circular packing (7) is arranged in three stages, the arrangement of the missing part (8) is 120 °. It is preferable to distribute and attach. Thereby, sealing performance is further ensured. In addition, the pressure resistance increases as the non-circular packings (7) are stacked.

Thus, the separation membrane element mounting apparatus of the present invention structurally uses a screw-type holding metal fitting (20), and compresses the upper and lower parts into a plurality of stacked round packings (7) made of graphite or the like. By applying the force, each of the graphite-made circular packings (7) is deformed so as to be flat in the horizontal direction, and the gap at the separation membrane element mounting portion is filled and a seal is secured.

According to the separation membrane element mounting apparatus of the first embodiment of the present invention, a graphite round circular packing in which a plurality of separation membrane elements (3) are stacked on the tube plate (10) of the separation membrane module (1). (7) Easy installation work or maintenance work to replace the multistage round packing (7) attached to the separation membrane element (3), and under various usage conditions In addition to being excellent in resistance, it is advantageous in terms of cost.

Next, FIG. 5 is an enlarged cross-sectional view showing a second embodiment of the separation membrane element mounting apparatus of the present invention, and a ring-shaped packing (9) made of a thin metal plate is attached to the upper end (3a) of the tubular separation membrane element (3). ) Is attached. FIG. 6 is an enlarged perspective view of a part of the ring-shaped packing (9) made of a thin metal plate used in the attachment device for the separation membrane element of FIG.

The second embodiment is different from the first embodiment in the shape of the seal member used for the attachment device for the separation membrane element (3).

That is, in the second embodiment, the sealing member is constituted by a ring-shaped packing (9) made of a thin metal plate having a concave cross section opened upward.

Then, a taper surface (13) that gradually tapers downward is provided on the annular receiving portion (12) at the lower part of the inner peripheral surface of the mounting hole (11) of the tube plate (10) of the separation membrane module (1). A thin tip (25) is provided at the lower end of the cylindrical drooping wall (22) of the metal fitting (20), and the thin tip (25) is below the tapered surface (13) of the annular receiving portion (12). The thickness is such that it can be fitted in the gap between the inner peripheral surface of the side receiving portion (12) and the outer peripheral surface of the upper end portion (3a) of the tubular separation membrane element (3).

The upper end portion (3a) of the separation membrane element (3) is inserted into the attachment hole (11) of the tube plate (10), and the upper end portion (3a) of the separation membrane element (3) in the attachment hole (11). A ring-shaped packing (9) made of a thin metal plate having a concave cross section on the outer peripheral surface is fitted with the opening (9a) facing upward, and the ring-shaped packing made of a thin metal plate (9) having a concave cross section is connected to the tube. The plate mounting hole (11) is received by an inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface.

Next, as shown in FIG. 7, the cylindrical hanging wall (22) of the presser fitting (20) is fitted into the mounting hole (11) of the tube plate (10), and the female thread portion ( 14) The male threaded portion (24) of the presser fitting (20) is screwed to 14), and the thin tip (25) of the cylindrical hanging wall (22) of the presser fitting (20) is a ring-shaped packing having a concave cross section ( 9) By entering the upward opening (9a) from above and pressing the thin metal ring-shaped packing (9) having a concave cross section by the thin tip (25) from above, the ring-shaped metal sheet is formed. The packing (9) is deformed along the outer surface of the thin tip (25) of the presser fitting (20), and the thin metal ring-shaped packing (9) and the thin tip of the presser fitting (20) are formed. (25) through the annular receiver ( Between the tapered surface (13) and which from the lower side of the receiving portion (12) inner peripheral surface and the upper end portion of the tubular membrane element (3) (3a) the outer peripheral surface 2) is sealed.

Here, the connecting pipe (5), which is originally a seal portion on the tubular membrane element (3) side, is made of dense ceramics, and this dense ceramics has a high Young's modulus compared to various metals, Basically, it must be assumed that there is no deformation.

Therefore, it is difficult to envisage a seal with an image of metal fixing like a so-called Swagelok as a mounting device for the separation membrane element (3). Therefore, a shape that is easily deformed even if it is made of stainless steel having a high Young's modulus and that fits the seal surface by deformation is desirable.

As a result of intensive studies in view of the above points, the present inventors have, for example, used a thin stainless steel having a thickness of 0.1 to 0.5 mm as a seal member used in the attachment device for the separation membrane element (3). A ring-shaped packing made of steel sheet is used, and the shape thereof is a ring-shaped packing (9) made of stainless steel sheet having a concave cross section (so-called half moon shape) opened upward.

Then, the ring-shaped packing (9) made of stainless steel thin plate having a concave cross section opened upward is provided on the outer peripheral surface of the upper end (3a) of the separation membrane element (3) with the opening (9a) facing upward. The ring-shaped packing (9) is received by the inward projecting annular receiving portion (12) of the tube plate mounting hole (11), while the annular receiving portion (12) has a downward direction. A taper surface (lower taper surface) (13) that gradually tapers inward is provided, and the inside of the upper surface of the ring-shaped packing (9) ring made of stainless steel thin plate is connected to the holding metal fitting (20) having a screw structure from above. The thin-walled tip (25) is pushed into the lower taper surface (13) of the annular receiving portion (12), and the ring-shaped packing (9) made of stainless steel sheet having a concave cross section is deformed. Fits the tapered surface (13) of the annular receiving portion (12) of the plate (10) and the inner peripheral surface of the receiving portion (12) below and the outer peripheral surface of the upper end portion (3a) of the tubular separation membrane element (3). Thus, the structure is sealed.

According to the ring packing (9) made of stainless steel thin plate used for the attachment device of the separation membrane element (3) of the present invention, even if it is made of stainless steel having a high Young's modulus, The point of the present invention is that the separation membrane element (3) is easily detachable and easily deformed, so that it can be surely sealed.

According to the separation membrane element mounting device of the second embodiment of the present invention, the separation membrane element (3) is made of a stainless steel thin plate having a concave cross section on the tube plate (10) of the separation membrane module (1). Easy workability such as work to attach via the ring-shaped packing (9) or maintenance work to replace the ring-shaped packing (9) made of stainless steel sheet attached to the separation membrane element (3). In addition to excellent resistance under use conditions, it is advantageous in terms of cost.

Examples of the present invention will be described below, but the present invention is not limited to these examples.

Example 1
First, the upper end of the separation membrane element (3) in the attachment hole (11) of the tube plate (10) of the separation membrane module (1) by the separation membrane element attachment device of the present invention shown in FIGS. (3a) Two pieces of graphite-made circular packings (7) are overlapped and fitted on the outer peripheral surface in two stages, and the defective parts (8) (8) of the circular packings (7a) (7b) adjacent to each other vertically Check that the graphite round packing (7) is attached through the separation membrane element (3) so that they can be placed at different positions as seen from the plane, and that there are no difficulties. did.

Next, with respect to the actual sealing performance of the two-stage stacked graphite round packing (7), instead of the separation membrane element (3), a cylindrical rod having the same diameter as the membrane element connecting pipe (5) made of dense ceramics (Not shown), the lower side of the tube plate (10) is a sealed container structure, the inside of the sealed container is made a pressurized state of 1.0 MPa with nitrogen (N ₂ ) gas, and the internal volume is known by measuring the pressure drop at a certain time of the closed container, nitrogen (N ₂₎ of leak of gas. As a result, a leak amount of 0.15 mL / min per separation membrane element was measured.

This was estimated by how much influence it has in an actual fluid environment, for example, when the mixed fluid of hydrogen (H ₂ ) and carbon dioxide (CO ₂ ) is separated by the tubular separation membrane element (3). The separation membrane element (3) having a low permeation performance is evaluated more severely for its leak performance, but it is assumed that the permeation performance is considerably low as 2.0 × 10 ⁻⁸ mol / (m ² · s · Pa). For example, a CO ₂ separation membrane uses a separation membrane element (3) whose target performance value is approximately 1.0 × 10 ⁻⁶ mol / (m ² · s · Pa)], and is equivalent to the measured leak amount. Assuming that the raw material gas has leaked to the permeate side, the separation performance of the separation membrane element (3) with a separation factor α = 250 is a decrease to the extent that the separation factor α is around 240. there were.

Here, the “separation coefficient α for the mixed fluid” means, for example, when the mixed fluid of hydrogen (H ₂ ) and carbon dioxide (CO ₂ ) is separated by the tubular separation membrane element (3), in the casing (2). supplying a mixed fluid of hydrogen _{(H 2)} and carbon dioxide (CO _2), the case of transmitting the carbon dioxide (CO ₂₎ to the tubular separation membrane element (3), at a zeolite membrane of the tubular membrane elements (3) On the basis of the gas concentrations on the supply side and the permeation side, the calculation is made as (CO ₂ concentration on the permeation side / H ₂ concentration on the permeation side) / (CO ₂ concentration on the supply side / H ₂ concentration on the supply side). is there.

Example 2
First, the separation membrane element (3) is attached to the tube plate (10) of the separation membrane module (1) with the ring-shaped packing made of stainless steel thin plate by the separation membrane element mounting device of the present invention shown in FIGS. It was confirmed that the procedure for attaching via (9) is easy and there are no difficulties.

Next, as for the actual sealing performance of the ring packing (9) made of stainless steel thin plate, the same test as in the case of Example 1 was conducted. As a result, the leakage amount of 0.13 mL / min per separation membrane element was obtained. In addition, the trial calculation of the influence on the separation factor α in the actual fluid environment is also at the same level as the case of the two-layered graphite round packing (7) in Example 1 described above, There was no problem level.

Claims

A casing (2) having a tube plate (10), a plurality of tubular separation membrane elements (3) attached to the tube plate (10) in a suspended and parallel manner, and each tubular separation membrane element (3) being a tube A holding metal fitting (20) for fixing to the plate (10) via a sealing member is provided, and a mounting hole (11) is formed in a penetrating manner at a separation membrane element mounting portion of the tube plate (10). 11) An inwardly projecting annular receiving portion (12) is provided at the lower portion of the inner peripheral surface, and an internal thread portion (14) is provided at the upper portion of the inner peripheral surface of the mounting hole (11). A top wall (21) having a passage hole (23) and a cylindrical hanging wall (22) connected to the outer periphery of the top wall (21), and a male threaded portion (24) is provided on the outer peripheral surface of the cylindrical hanging wall (22). In the separation membrane module (1), the sealing member is The upper end portion (3a) of the separation membrane element (3) is inserted into the mounting hole (11) of the tube plate (10), and the mounting portion (3a) is attached to the tube plate (10). In the hole (11), a plurality of cutout circular packings (7) are stacked and fitted on the outer peripheral surface of the upper end (3a) of the separation membrane element (3), and the cutout circular packings (7a) adjacent to each other vertically. The missing portions (8) and (8) of (7b) are arranged at positions different from each other as seen from the plane, and these circular packings (7) are provided at the lower part of the inner peripheral surface of the tube plate mounting hole (11). The cylindrical projecting wall (22) of the press fitting (20) is fitted into the mounting hole (11) of the tube plate (10) by being received by the inward projecting annular receiving portion (12), and the mounting hole (11) Male thread part (24) of presser fitting (20) to female thread part (14) Are screwed together, and the plurality of round circular packings (7) are pressed against the annular receiving part (12) at the lower part of the peripheral surface of the mounting hole (11) by the tip of the cylindrical hanging wall (22) of the presser fitting (20). The separation is characterized in that the inner peripheral surface of the mounting hole (11) and the outer peripheral surface of the upper end portion (3a) of the separation membrane element (3) are sealed through these circular packings (7). Attachment device for separation membrane element in membrane module.
The apparatus for attaching a separation membrane element in a separation membrane module according to claim 1, characterized in that the notched circular packing (7) is made of graphite.
A casing (2) having a tube plate (10), a plurality of tubular separation membrane elements (3) attached to the tube plate (10) in a suspended and parallel manner, and each tubular separation membrane element (3) being a tube A holding metal fitting (20) for fixing to the plate (10) via a sealing member is provided, and a mounting hole (11) is formed in a penetrating manner at a separation membrane element mounting portion of the tube plate (10). 11) An inwardly projecting annular receiving portion (12) is provided at the lower portion of the inner peripheral surface, and an internal thread portion (14) is provided at the upper portion of the inner peripheral surface of the mounting hole (11). A separation membrane module (1) comprising a top wall having a passage hole and a cylindrical hanging wall (22) connected to the outer peripheral portion thereof, and having an external thread portion (24) provided on the outer peripheral surface of the cylindrical hanging wall (22). ) In which the sealing member is open upward A tapered surface formed by a ring-shaped packing (9) made of a metal concave plate having a concave surface and gradually tapering downward toward the annular receiving portion (12) at the lower part of the inner peripheral surface of the mounting hole (11) of the tube plate (10). (13) is provided, and a thin tip portion (25) is provided at the lower end of the cylindrical hanging wall (22) of the presser fitting (20), and the thin tip portion (25) is an annular receiving portion (12). And a thickness that can be fitted into a gap between the inner peripheral surface of the receiving portion (12) below the tapered surface (13) and the outer peripheral surface of the upper end portion (3a) of the tubular separation membrane element (3), The upper end portion (3a) of the separation membrane element (3) is inserted into the attachment hole (11) of the tube plate (10), and the upper end portion (3a) of the separation membrane element (3) in the attachment hole (11). A ring-shaped packing (9) made of a thin metal plate having a concave cross section on the outer peripheral surface has an opening The ring-shaped packing (9) made of a thin metal plate having a concave cross section is fitted with the portion (9a) facing upward, and the inward projecting annular receiving portion (12) at the lower part of the inner peripheral surface of the tube plate mounting hole (11) The cylindrical hanging wall (22) of the presser fitting (20) is fitted into the attachment hole (11) of the tube plate (10), and the presser fitting (14) is inserted into the female screw part (14) of the attachment hole (11). The male screw part (24) of 20) is screwed together, and the thin-walled tip part (25) of the cylindrical hanging wall (22) of the presser fitting (20) is the upward opening of the ring-shaped packing (9) having a concave cross section. (9a) is inserted from above, and the thin metal ring-shaped packing (9) having a concave cross section is pressed from above by the thin tip (25), so that the metal thin-plate ring packing (9) is Along the outer surface of the thin tip (25) of the presser fitting (20) The taper surface (13) of the annular receiving portion (12), and the ring-shaped packing (9) made of the deformed metal sheet and the thin end portion (25) of the presser fitting (20) Mounting of the separation membrane element in the separation membrane module, characterized in that the space between the inner peripheral surface of the lower receiving portion (12) and the outer peripheral surface of the upper end portion (3a) of the tubular separation membrane element (3) is sealed apparatus.
4. The attachment device for a separation membrane element in the separation membrane module according to claim 3, wherein the ring-shaped packing (9) made of a thin metal plate having a concave cross section opened upward is made of stainless steel.